Mold for molding concrete structural units



Jan. 4, 1949. l J, B. FRASER 2,458,155

MOLD FOR MOLDING CONCRETE STRUCTURAL UNITS Filed Sept. l5, 1945 2 Sheets-Sheet ljan. 4, i949. J. B. lFRASER 2,458,155

MOLD FOR MOLDING CONCRETE STRUCTURAL UNITS Filed Sept'. 15, 1945 2 Sheets-Sheet 2 fr www Patented Jan. 4, 1949 UNITED STATES PATENT OFFICE.,

MOLD FOR MOLDING CQNCRETE STRUCTURAL UNITS James B. Fraser, Fort Lauderdale, Fla.

Application September 13, 1945, Serial No. 616,098

3 Claims. l

The invention relates tomold false work construction, and more especially to a knock-down molding form for concrete or other plastic work.

The primary object of the invention is the provision of such a structure in which steel, wood, plastic, or any other type of material rigid enough to hold its shape can be molded. A further object is the provision of such a mold which may be handled by unskilled labor in assembly, use and disassembly, the structure being designed for a uniformly dimensioned piling of any desired shape or size.

Another object of this invention is to mold a rst concrete block and to mold a second juxtaposedvblock, if desirable, in the same apparatus without removal of the first block.

Another object of the invention is the provision of a structure of this character which assures uniform finished product and eliminates the danger of the forms bulging, breaking loose or shoreslipping.

Another object of the invention is the provision of structure of this character built to precision measurements, and so constructed that in assembly all surfaces must be thoroughly cleaned before being put together in order to permit the bolting of the cages and forms into proper relation thus securing a uniform cast product. A further ob'- ject is the provision of a structure which can be assembled and disassembled with ease and dispatch, there being no warping, twisting, splitting or other damage to the structure in its use and which requires a minimum of support and bracing for servicing.

A still further object of the invention is the provision of a structure, of this character which is simple in construction, reliable and efcient in operation, strong, durable, and positive in operation, and inexpensive to manufacture and install.

With these and other objects in view, the invention consists in the features of construction and combination and arrangement of parts, as will be hereinafter more fully described and illustrated in the accompanying drawings, which disclose the preferred embodiments of the invention, and pointed out in the hereunto appended claims.

In the accompanying drawings:

Figure 1 is an exploded elevation of one of the uprights or vertical members of the form constructed in accordance with the invention.

Figure 2 is a side edge View thereof.

Figure 3 is an exploded detail view of one of the base sills of the form.

Figure 4 is an exploded detail view of one of the cross struts for the form.

Figure 5 is a view partly broken away of another Shaper member of the form.

Figure 6 is a view partially broken away of a Shaper member of the form adapted particularly to be used in opposite relation to the Shaper shown in Figure 5.

Figure 7 is an end elevation of the structure in a set-up condition for the molding operation.

Figure 8 is a side elevation of the structure shown in Figure '7.

Figure 9 is a View similar to Figure 7 showing a plurality of shapers in molding position.

Figure 10 is a View similar to Figure 7 showing a shaper in molding position after certain lower blocks have been formed.

Figure 11 is a fragmentary elevation partly in vertical section through one of the struts and the upstanding posts or uprights of the form.

Figure 12 is a fragmentary exploded perspective View showing a base sill and upright or post in attachable relation to each other.

Figure 13 is a fragmentary perspective View showing the upright or post and base sill interconnected with each other.

Figure 14 is a sectional view illustrating details of the Shaper rails and fasteners therefor.

Similar reference characters indicatev corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, the false work construction or universal molding form constituting the present invention, comprises a plurality of inverted substantially U-shaped or channeled sill pieces Iil which are adapted to be supported in spaced relation to each other superimposed upon a foundation or other supporting medium which has been pre-prepared level and in the top area or crown of each sill piece adjacent to each end thereof is a cross slot l I for the detachable interfitting therewith of an upright or post I2, which can be of any length or height. At the attaching end of the latter is a tongue I3 having the piloting tip I4 angled slightly'to the plane of the tongue I3 which is initially fitted into the slot I I for the intertting of the tongue I3 into the sill piece, as best seen in Figures l2 and 13 of the drawings.

Each upright or post on opposite side edges thereof has outturned reinforcing flanges I5, while centrally of such upright or post is a row of longitudinally directed spaced holes I6 for selectively accommodating a pair of fasteners such as nut carrying bolts I'I which detachably fasten the end head plate I8 next to such upright or post thereto in a desired adjusted position.

These head plates l 8 are terminals to a cross strut I9 and are used above the molding work to hold the opposed uprights or posts in vertical parallel spaced relation to each other, as best seen in Figures 7, 8, 9 and 10 of the drawings.

Adapted to be located between the uprights or posts l2 are shaper rails 29, which in their length correspond to the length of the work to be executed and these rails 2U are formed with tongue and groove formation areas 2l and 22, respectively, for corresponding formation on or in a concrete mass 23 to be shaped and molded by such rails 20. The rails 20 are in horizontally aligned relation with each other and in their opposed spaced disposition, one to the other, are detachably fastened in place to the uprights or posts I2, each fastener or stud 24 therefore being in selective engagement in a hole I6 adapted to accommodate such fasteners or studs for the securing of the rail in working position within the set-up structure, as best seen in Figures 7, 9 and 10 of the drawings. The studs 24 are detachably connected to the posts by any suitable means such as the nuts (unnumbered) seen in Figure 9.

As disclosed in Figure 7 of the drawings, the

set-up structure constituting the present invention is positioned for the molding and shaping of a concrete slab piling above a previously Vformed slab denoted generally at 23, while in Figure 9 two of the molds are positioned for the molding of two of the concrete slab pilings in stacked vertical relation to each other, these slabs being superposed with relation to one another and are individually molded step by step in the use of the structure. Figure 10 disclosed a mold, iilled with concrete, positioned on top of two previously formed slabs, and the 'three figures disclose the wide variety of adaptation to which the mold can bev put. Obviously an entire stack or column of slabs can be molded simultaneously by the use of a large number of molds with conventional spacer plates therebetween, or in the interest of economy a, single slab may be molded at a time and permitted to harden, the mold then being removed from the hardened or partially hardened slab and positioned thereabove for the forming of the next slab. When an entire stack of molds are made simultaneously, an amount of concrete may be poured in the appropriate manner and a spacer 4` placed thereon. This operation is then repeated until the desired number of blocks are poured.

The parts of the structure can be made from steel, wood, plastic, or any other type of material that is rigid enough to hold its shape and can be used in connection with cage fastening, the steel construction being recommended because of durability, economy of maintenance and handling.

From the foregoing it will now beA seen that there is herein provided a device accomplishing all the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of the inventive concept, and as many modifications mayv be made in the embodiment herein shown and described is to be understood that all matter here-l in is to be interpreted merely as illustrative and not in a limiting sense.

What is claimed is:

1. A structure' of the kind described comprising a base sill, a pair of upright posts having a plurality of apertures therein and having separable interlocking engagement with the base sill, a vertically adjustable cross strut secured to the posts and located entirely between the same, shaper pieces having tongue and groove rwork contacting surfaces and studs opposite said surfaces for protrusion through said apertures, said shaper pieces held by said posts between the same for concrete molding thereby, fasteners detachably connecting said cross strut to said posts, and fasteners detachably connecting said studs to said postsin molding disposition to each other.v

2. The combination of claim 1 and said base sill having slots therein, said upright posts having tongues positioned in said slots.

3. The combination ofclaim 2 and piloting tips on said last named tongues for initial fitting in said slots.

JAMES B. FRASER.

REFERENCES CITED The following references are of record in the 1,651,041 Richards Nov. 29, 1927 

